COULEE DAM 1 SW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451767) COULEE DAM 1 SW
From Year=1934 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 4 12 95 301 570 765 1022 989 713 348 50 7 4877
40 S 4 16 111 413 982 1747 2769 3758 4471 4819 4870 4877 4877
45 M 0 2 29 170 415 615 867 834 563 210 13 1 3720
45 S 0 2 31 201 616 1231 2099 2933 3496 3706 3719 3720 3720
50 M 0 0 5 76 270 465 712 679 415 104 2 0 2729
50 S 0 0 6 82 351 816 1529 2208 2622 2727 2729 2729 2729
55 M 0 0 0 26 149 318 557 524 274 40 0 0 1889
55 S 0 0 0 26 175 493 1050 1575 1849 1889 1889 1889 1889
60 M 0 0 0 6 66 186 404 371 155 11 0 0 1199
60 S 0 0 0 6 72 258 662 1033 1188 1199 1199 1199 1199
Corn Growing Degree Days
50 M 0 4 54 178 335 468 648 627 436 187 13 1 2952
50 S 0 5 58 236 572 1039 1687 2315 2750 2938 2950 2952 2952
M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Western Regional Climate Center, wrcc@dri.edu